import React from "react";
import ReactDom from "react-dom";

class Time extends React.Component{
  constructor(props){
    super(props);
    this.state = {num:0};
  }
  render(){

    if(this.props.max>this.state.num){
      setTimeout(()=>{
        this.setState({num:this.state.num+1});
      },1000);
    }

    return <div>
      {this.state.num}
    </div>
  }
}

ReactDom.render(<Time max={6} />,document.body);
